Hi,
Here is a link which shows how to remove/replace the LCD screen. It may be of interest to you.
https://www.youtube.com/watch?v=MXhseTD-Vok&feature=youtu.be
As mentioned in the comments listed under the video, the best bet to get a screen is find a broken unit that has a good screen.
As for removing the superglue. Was the nail polish remover you used acetone or non acetone based? Acetone is best for removing superglue as the non acetone based nail polish remover doesn't work so well.
The other sure way to remove superglue is ''not recommended ''around electronics ''ever''. It involves water, covering with damp cloths and clingwrap for 3-4 hours, peeling it off as it softens. Definitely a no - no.